Electric-light globe



Jan."19,1926. 1,570,345 A. L. ELIASOFF ET AL ELECTRI C LI GHT GLOBE Filed Jan. 6. 1925 %TORA'EY Patented Jan. 19, 1926.

UNITED STATES" PATENT OFFICE.

ABRAHAM L. ELIASOFF AND CHARLES BIRNBAUM, OF NEW YORK, N. Y.

ELECTRIC-LIGHT GLOBE.

Application filed January 6, 1923. Serial No. 610,992.

To all whom it may concern:

Be it known that we, ABRAHAM L.

Eiiiasorr and CHARLES BIRNBAUM, citizens of the United States, and residents of the city of New York, borough of Manhattan, in the county and State of New York, have invented new and useful Improvements in Electric-Light Globes, of which the followin is a full, clear, and exact description.

his invention relates to illumination and particularly to a means of varying the amount of light by causing therays to pass through transparent globes having portions thereof rendered translucent.

More particularly the invention relates to the combination of a light bulb having translucent portions and a transparent globe surrounding said bulb, the latter of which, also, comprising translucent portions, can be adjusted so that the translucent portions thereof overlie the transparent parts of the light bulb.

Drawings.

Figure 1 is a sectional view taken through a globe showing my invention applied there to and also showing the method of mounting said globe over an electric light bulb.

Figure 2 is a section of the globe and bulb taken on the line 22 of Figure 1 and showin how the translucent parts of the globe are adapted to overlie the transparent portions of the bulb, so that the two will form a dimming element for a light.

Figure 3 is an elevational view of the bulb covering globe showing the position of the translucent portions thereon.

Description.

Referring to the drawings in detail, 10 denotes a lamp socket having affixed thereto a flange 11 which supports the cup member 12 attached thereto in any well known manner.

An electric light bulb 13 is held in said socket 10 through the medium of the usual scrmv-threaded connection 14. The bulb 13 made of the usual glass and may be of any desired shape or size. It is provided with longitudinally extending translucent portions or strips 15 which terminate at the tip 16 of the bulb. These translucent portions are preferably made by frosting the bulb, the frosting being of a. light or W de Whi he er is desi Th p rtions may also be colored to produce a soft 12, to prevent the escape of light and tohelp maintain the globe in proper position around the bulb. Thumb screws 19, of the type used in lighting fixtures are provided in the cup member 12 on the periphery and adjacent the edge thereof, and engage a straight position 20 formed in the globe.

The globe is provided, as is the bulb, with translucent portions or strips 21 which match those of the bulb and which terminate at the center 22 of the closed end of the globe.

It can be seen then upon reference to Figure 2 that when the translucent portions of the bulb and globe are in superposed relation, the light rays will pass through the transparent portions of the bulb and globe, and they will be diifused in the translucent portions thereof. This position of the globe in relation to the bulb will produce the brightest light.

When a dimmer light is desired the globe 17 is revolved until the translucent portions thereon overlie the transparent portions of the bulb. This movement will also bring the transparent portions of the globe over the translucent portions of the bulb so that all of the light rays will pass through translucent portions and thereby being diffused will produce a dimmer light.

It is, too, understood that my invention may be applied to any type of lighting element, that is, electric are light, gas light or any form of light production wherein it is possible to employ relatively movable coverings.

Claim. 

